Rock-drilling mechanism



Au 26, 1930. E. s. GARTIN ROCK DRILLING MECHANISM Filgcd July 23, 1923 Patented Aug. 26, 1930 UNHED? STATES PATENT O-IE EIJMER. G. GARTIN', OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN 1VIA- GHINERY COMPANY, A CORPORATION OF MASSACHUSETTS ROCK-DRILLINGMEGHANISM Application filed July 23,

My invention relates to rock drilling mechanisms and particularly to improved controlling mechanisms for such devices.

An object of my invention is to provide an improved controlling 'mechanism for a rock drilling device. Another object of my invention is to provide an improved combined throttle valve and lubricating means for arock drilling mechanism. A further object of my invention is to provide an improved valve mechanism for controlling the supply of cleansing fluid and the supply of motive fluid and also for enabling effective lubrication of the valve mechainsm itself and the supply of lubricant prior to the operation of the motor controlled by the mechanism so that the motor willbe adequately lubricated when started. Other ob-' jects and advantages of my invention will hereinafter more fully appear.

In the accompanying drawings 1' have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings'- 7 I Fig. 1 is a plan view, with parts broken away, of a rock drilling mechanism in which the illustrative embodiment of my invention is incorporated.

Fig.2 is a transverse section on the line 22 of Fig. 1, with parts omitted, and on an enlarged scale, the valve being shown in r a different position. I

Figs. 3 and 4:: are detail sections through the throttle valve mechanismrshowi ng the parts in difierent angular positions.

For purposes of illustration I have shown the illustrative form of my invention in corporated in a rock drilling mechanism whichis shown in Fig. 1. This'mechanism comprises a drilling motor 1 having a valve chest 2 to which fluid is supplied through'a passageway 3 from a pipe line 4: under control of a valve mechanism generally designated 5. Lubricant is supplied by :automatic means not shown during the operation of the motor 1 from a lubricant reservoir 6 to the valve chest and so during the running of the motor the same is automatically adequately lubricated. I It is desirable,

however, to provide some surplus lubricant 1923. Serial No. 653,102.

at the time when the drill is to be started up and also it is advisable to keep the drill adequately lubricated during its idle periods.

For the purpose of controlling the operation of the motor and the supply of cleansing fluid to the hollow drill steel 7 and for the further purpose of supplying lubricant to the motor at a time when the same is not in operation, the improved form of controlling mechanism previously referred to as generally indicated 5 is provided. This comprises a valve casing 8, herein in the form of a boss formed upon the rear head of the motor 1. This casing 8 has a conical bore 9 therein in which a valve member 10 is rotatable. Arranged in alinement with the valve member 10 is a conical supply coupling llheld in position by a threaded sleeve 12 which cooperates with a conical portion 13 formed upon the member 11, and

the spring 14 extending between the valve 10 and the member 11 maintains it fluid tight. The valve member 10is provided with a central chamber 17 which communicates at the larger end of the valve with the fluidsupply and which opens by way of a port 18 through the side of the valve member. This port 18 opens into the rear end of the passageway 3 and is adapted to supply motive fluid to the latter. There is :a laterally extending notch 19 formed in communication with the passage 17 which is adapted to conduct the fluid supply to a passageway 20 which leads to a familiar form of cleansing fluid supply tube mechanism generally designated 21, which is not shown in detail herein but is of the double tube type, water beingsupplied through a line 22. Formed in the periphery of the valve '10 are two grooves one of which extends circumferentially and which is designated 2 1 and the other of which extends longitudinally for the greater portion of the length of the valve and is designated 25, these grooves communicating with each other so that the pair make up a somewhat T-shaped' groove. Also entering the bore of the valve casing is a passageway 26 which at its outer end terminates in an opening 27 in a boss 28 formed upon the valve casing member and into this passage is screwed a plug 29 which may be removed by inserting a nail or the end of a screw driver in an opening 30 therein and unscrewing the same, for supplying lubricant to the bore oi the valve chest.

It will be observed from Fig. 1 that when the valve member is in closed position, that is when no fluid is being supplied to the passages 3 or 20, the grooves 2i and 25 both communicate with the passageway 26 and so that by removing the plug 29, oil may be poured in to the opening 27 and will flow lon itudinally of the valve along the groove 20 while a portion of the oil will also flow through the portion of the groove 24: into the passage 3 from which it may pass into the valve chest when air is first turned on, and so into the interior of the motor, or if desired by the drill runner previously by tilting the motor. Suitable operating means will, of course, be supplied for rotating the valve, a handle 31 being provided herein.

From the foregoing description, the mode of operation of this mechanism will be readily apparent. hen the drill is shut down and is about to be started, the plug 29 will be removed and oil will be poured in suit able quantity into the opening 27. This oil will flow through the passage 26 into the grooves 2st and 25 and a part will flow through the former into the passage 3 where it will be ca "ried by the first rush of air into the valve chest and provide adequate initial lubrication for the motor. Some of this lubricant will, however, also flow along the longitudinally extending groove 25 and will so lubricate a portion of the walls of the valve chamber 9 and such residual quantity of lubricant as may remain in the groove 25 (note that it will not all flow through the groove 2% by reason of the inclination of groove 25 shown in Fig. 2) will be distributed to lubricate the remaining portion of the walls of the valve chamber and facilitate the turning movement of the valve.- The plug having been replaced, the valve may be turned to a position corre sponding to that shown in Fig. 3 and motive fluid will flow through the port 18 to the assage 3 and air will also flow through the notch 1.9 through passage 20 and to the tube, the tube as is customary receiving a jet of air before the motor is started when the valve is being moved to the position shown in Fig. 3.

lVhile I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a rock drilling mechanism, means forming a passage leading to a motor, means forming a passage leading from a source of fluid supply, a valve casing between said passages, and a valve in said casing adapted to interconnect said passages, said valve having a circumferentially extending groove in its periphery and said valve casing having an oil hole therein registering with said groove when the valve is in position to shut off communication between said fluid supply passage and said motor passage, said groove also communicating with said first mentioned passage when said valve is in such position.

2. In a rock drilling mechanism, means forming a passage leading to a motor, means forming a passage leading from a source of fluid supply, a valve casing between said passages, and a valve in said casing adapted to interconnect said passages, said valve having a T-shaped groove in its periphery and said valve casing having an oil hole therein registering with said groove when the valve is in position to shut oil communication between said fluid supply passage and said motor passage, one part of said groove communicating with said first mentioned passage also when said valve is in such position.

3. In a rock drilling mechanism, means forming a passage leading to a motor, means forming a passage leading from a source of fluid supply, a valve casing between said passages, and a valve in said casing adapted to interconnect said passages, said valve having in its periphery a groove having portions extending respectively longitudinally and circumferentially of the valve and said valve casing having an oil hole therein. registering with said groove when the valve is in position to shut oil communication between said fluid supply passage and said motor passage, said groove communicating with said first mentioned passage also when said valve is in such position through its second mentioned portion and being adapted to lubricate its casing through said first mentioned portion.

4. In a rock drilling mechanism, means forming an oil supply passage, means forming a fluid inlet passage for a motor, a valve casing having a bore with which said passages communicate, means forming a passage leading to a source of pressure fluid also communicating with said bore, and a manually operable valve in the bore in said casing having a passage formed therein. for connecting said oil passage'with said fluid inlet passage to permit a free flow of oil through the valve directly to said motor while said valve is in position to shut off communication between said fluid supply passage and said motor inlet passage.

5. In a rock drilling mechanism, means forming a passage leading to a motor, means forming a passage leading from a source of fluid supply, a valve casing between said passages having an oil supply port, and a valve in said casing having a passage for interconnecting said passages, and a passage for connecting said oil port with said motor passage when said'supply passage is closed by said valve.

6. In a rock drilling mechanism, means forming a passage leading toia motor, means forming a passage leading from a source of fluid supply, a valve casing between said passages, and a valve in said casing having a bore adapted to interconnect said passages, said valve having a passage formed therein and said valve casing having an oil hole therein registering with said valve passage when the valve is in position to shut off communication between said motor passage and said fluid supply passage, said valve passage also communicating with said motor supply passage when said valve is in such position.

7. In a drilling mechanism, a drilling motor having a fluid supply passage having different portions, a lubricant chamber, and means adapted to connect said chamber with one of said portions to permit a free flow of lubricant to said motor only when communication between said portions of the fluid supply passage is shut oil.

8. In a drilling mechanism, a drilling motor having a fluid supply passage having different portions, a lubricant chamber, and rotatable means adapted to connect said chamber with one of said portions to permit a free flow of lubricant to said motor only when communication between said portions of the fluid supply passage is shut off.

In testimony whereof I affix'my signature.

ELMER G. GARTIN. 

